of ElectroMagnetic waves placed in order by decreasing wavelengths. (ripples
anything that causes a disturbance and transmits energy thru matter or
space.(light, sound, seismic)
energy is carried away from source.
energy as vibration occurs.
wave travels-energy causes matter to move.
substance that wave travels through.
waves are a form of energy that travels through space or matter. ie: sunlight
(# of waves in set time) decides energy.
wavelengths & high frequency= high energy
wavelengths & low frequency= low energy
includes radio, microwave, infrared, visible light, ultraviolet light, x-ray,
& gamma rays.
light is narror range within the EM spectrum
waves we can see from the EM spectrum, rest invisible.
from colors (ROY G BIV), different wavelengths of light.
wavelength-red; longest-violet, most energy.
affect the eye differently so we see different colors.
decided by absorbtion from object. Objects absorb color (hide) & reflect
seen is color reflected off object.
all color-white// absorb all color-black
mixture of colors
ozone layer- sunlight on oxygen molecules.
Light- when all colors are mixed.
light of all wavelengths of color combined.
enters and sent to retina (eye); 3 cones; red, blue, green;
colors are absorbed of visible light-see white.
(human’s) can distinguish millions of colors & hues.
white light in, color out due to bend of light by prism.
white light into parts.
of Light: -when light hits an object it has 3
REFLECTION: (bounces off)
hits an object that it can’t enter and so bounces off. ie: mirror,
Regular reflection- same angles due to smooth surface. ie: mirror. Always equal.
Angle of incidence- incoming rays and imaginary line perpendicular to
Angle of reflection- reflected ray from light wave and imaginary line
1.2. Diffused reflection-
rays scatter due to
uneven or bumpy surface.
see most objects because of scattering.
OF LIGHT: (passes
Light usually travels in a straight line unless medium changes/bends it. In
rays away from
of light through matter (things that take up space-8CSS)
some light thru
ie: wax paper
change in speed & direction.
passing from one material to another it will change speed
more slowly through certain medium (atoms-like diffusion)
ie: light travels faster in air than water
bends when changes from one medium to another.
direction when interacts with matter.
depends on wavelenghts (shorter-more bend).
of light due to change of speed.
refracts once hits lens in eye; to retina. (camera)
only see when light waves bounce off object, reflected or scattered, and into
not needed for light to move, part of EM Wave.
light absorbed by the material/medium that takes in the light holds it.
transfer of energy by light waves to particles in matter.
dark material and pavement.
t-shirt in summer- hot due to holding light energy.
weakens as further from source- more matter absorbs it.
closer to the light are brighter than distant objects.
particles absorb some light so gets dim the further away.
*the release of light energy by matter that
absorbed extra energy.
decides what happens.
scatters in all directions once released.
can see outside of beam from flashlight.
sunlight throughout air.
is blue because blue is shorter wavelength and scattered more.
Convex lens- thick middle and thin on edges
thick outside and thin in middle
-bends parallel lines of light to focal
out parallel lines of light -surface
larger and right-side up.
smaller and upright ie:
eye, microscope, magnifying glass
glases to correct far-away vision